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Finding the Fourth Proportional to 15,480.96, 21,364.48 and 8,766.88

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Solution

The fourth proportional to 15,480.96, 21,364.48 and 8,766.88 is: 12,098.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,480.96 : 21,364.48 = 8,766.88 : x
  2. Step 2: Convert to fraction form
    15,480.96/21,364.48 = 8,766.88/x
  3. Step 3: Cross multiply
    15,480.96x = 21,364.48 × 8,766.88
  4. Step 4: Simplify right side
    15,480.96x = 187,299,832.42
  5. Step 5: Solve for x
    x = 187,299,832.42/15,480.96
  6. Step 6: Final answer
    x = 12,098.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.